/usr/include/KF5/KrossCore/ is in kross-dev 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KrossCore/Kross/
/usr/include/KF5/KrossCore/Kross/Core/
/usr/include/KF5/KrossCore/Kross/Core/Action
/usr/include/KF5/KrossCore/Kross/Core/ActionCollection
/usr/include/KF5/KrossCore/Kross/Core/ChildrenInterface
/usr/include/KF5/KrossCore/Kross/Core/ErrorInterface
/usr/include/KF5/KrossCore/Kross/Core/Interpreter
/usr/include/KF5/KrossCore/Kross/Core/KrossConfig
/usr/include/KF5/KrossCore/Kross/Core/Manager
/usr/include/KF5/KrossCore/Kross/Core/MetaFunction
/usr/include/KF5/KrossCore/Kross/Core/MetaType
/usr/include/KF5/KrossCore/Kross/Core/Object
/usr/include/KF5/KrossCore/Kross/Core/Script
/usr/include/KF5/KrossCore/Kross/Core/WrapperInterface
/usr/include/KF5/KrossCore/kross/
/usr/include/KF5/KrossCore/kross/core/
/usr/include/KF5/KrossCore/kross/core/action.h
/usr/include/KF5/KrossCore/kross/core/actioncollection.h
/usr/include/KF5/KrossCore/kross/core/childreninterface.h
/usr/include/KF5/KrossCore/kross/core/errorinterface.h
/usr/include/KF5/KrossCore/kross/core/interpreter.h
/usr/include/KF5/KrossCore/kross/core/krossconfig.h
/usr/include/KF5/KrossCore/kross/core/krosscore_export.h
/usr/include/KF5/KrossCore/kross/core/manager.h
/usr/include/KF5/KrossCore/kross/core/metafunction.h
/usr/include/KF5/KrossCore/kross/core/metatype.h
/usr/include/KF5/KrossCore/kross/core/object.h
/usr/include/KF5/KrossCore/kross/core/script.h
/usr/include/KF5/KrossCore/kross/core/wrapperinterface.h